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3 years ago

10

A box contains

2 answers:

elena-s [515]3 years ago

4 0

9 because if you subtract 11 from 19 you get 9

andriy [413]3 years ago

4 0

11 - 19 equals 9 so 9

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Factorise x^2/4-y^2/4

Nuetrik [128]

Answer:

$\large\boxed{\left(\dfrac{x}{2}-\dfrac{y}{2}\right)\left(\dfrac{x}{2}+\dfrac{y}{2}\right)=\dfrac{x-y}{2}\cdot\dfrac{x+y}{2}}$

Step-by-step explanation:

$\dfrac{x^2}{4}-\dfrac{y^2}{4}=\dfrac{x^2}{2^2}-\dfrac{y^2}{2^2}\qquad\text{use}\ \left(\dfrac{a}{b}\right)^n=\dfrac{a^n}{b^n}\\\\=\left(\dfrac{x}{2}\right)^2-\left(\dfrac{y}{2}\right)^2\qquad\text{use}\ (a-b)(a+b)=a^2-b^2\\\\=\left(\dfrac{x}{2}-\dfrac{y}{2}\right)\left(\dfrac{x}{2}+\dfrac{y}{2}\right)=\dfrac{x-y}{2}\cdot\dfrac{x+y}{2}$

3 0

3 years ago

What is 8% of 70....?

Kruka [31]

11% not 100% sure Bc I calculated but hope it helped!

7 0

3 years ago

Read 2 more answers

Π (pi) is an unending decimal. Find the Circumference of the circle below using exact π (pi).

dalvyx [7]

Step-by-step explanation:

Given radius, r = 5,

Circumference of Circle, C

$= 2\pi \: r \\ = 2\pi(5) \\ = 10\pi \: units$

7 0

2 years ago

Read 2 more answers

How many times does 1/4 go into 9/16

Monica [59]

Answer as a fraction = 9/4

Answer in decimal form = 2.25

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Explanation:

1/4 = 4/16 after multiplying top and bottom by 4

We have some number x such that

(4/16)x = 9/16

we can multiply both sides by 16 to clear out the fractions, getting 4x = 9

Then we divide both sides by 4 to get x = 9/4 = 2.25

6 0

3 years ago

6. A bookstore recorded a decrease in the sales of paperback books over the past year. From last year to this year the store exp

tensa zangetsu [6.8K]

Answer:

6966

Step-by-step explanation:

7740*10%=774

7740-774=6966

5 0

2 years ago